The addition of 3 ml of HCl will

increase the concentration on the reactants side

increase the concentration on the products side

will have not effect in either side

Adding water will make the reaction shift

The reaction will not shift and it will remain the same

Shifts In Equilibrium Experiment

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| By Mrscuellar

Mrscuellar

Community Contributor

Quizzes Created: 1 | Total Attempts: 396

Questions: 10 | Attempts: 396 | Updated: Mar 20, 2023

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Shifts in Equilibrium Experiment. Take this test as many times as you need in order to get 100% , and print out the certificate of accomplishment to turn in the day of the experiment.

Questions and Answers

1.

How will you notice a shift in the equilibrium during the experiment?
- A.
  
  Presence of bubbles
- B.
  
  Change in color
- C.
  
  Presence of vapor
Correct Answer
B. Change in color

Explanation
A shift in the equilibrium during the experiment can be noticed by observing a change in color. This is because a change in color indicates a change in the composition of the substances involved in the reaction. In a chemical equilibrium, the forward and reverse reactions are occurring at the same rate, resulting in a stable system. However, if there is a shift in the equilibrium, it means that the balance between the forward and reverse reactions has been disrupted, leading to a change in the concentration of the reactants and products, which can be observed as a change in color.

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2.

Which acid will be used for this experiment?
- A.
  
  Sulfuric acid
- B.
  
  Nitric acid
- C.
  
  Hydrochloric acid
Correct Answer
C. Hydrochloric acid

Explanation
Hydrochloric acid is the correct answer for this experiment because it is commonly used in various experiments due to its strong acidic properties. It is a strong acid that can easily dissociate in water to release hydrogen ions, making it an effective acid for reactions and reactions involving metals. It is also commonly used in laboratory settings for tasks such as pH adjustment, chemical synthesis, and cleaning of equipment. Therefore, hydrochloric acid is the most suitable acid to be used in this experiment.

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0
1
3.

What concentration of CoCl2 will be used?
- A.
  
  1.0 M
- B.
  
  0.01 M
- C.
  
  0.1 M
Correct Answer
C. 0.1 M

Explanation
The concentration of CoCl2 that will be used is 0.1 M.

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4.

The addition of 3 ml of HCl will
- A.
  
  Increase the concentration on the products side
- B.
  
  Increase the concentration on the reactants side
- C.
  
  Will have not effect in either side
Correct Answer
B. Increase the concentration on the reactants side

Explanation
When 3 ml of HCl is added, it will react with the reactants in the chemical equation. Since HCl is a strong acid, it will dissociate completely into H+ ions and Cl- ions. The H+ ions will react with the reactants, increasing their concentration and shifting the equilibrium towards the reactants side. Therefore, the addition of 3 ml of HCl will increase the concentration on the reactants side.

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5.

Pink color means the shift in equilibrium is towards
- A.
  
  Product side
- B.
  
  Reactant side
- C.
  
  The reaction is in equilibrium
Correct Answer
B. Reactant side

Explanation
The pink color indicates that the shift in equilibrium is towards the reactant side. This means that the concentration of reactants is increasing while the concentration of products is decreasing, indicating that the reaction is not yet at equilibrium.

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6.

Adding water will make the reaction shift
- A.
  
  Towards the product
- B.
  
  Towards the reactants
- C.
  
  The reaction will not shift and it will remain the same
Correct Answer
B. Towards the reactants

Explanation
When water is added to a reaction, it increases the concentration of the reactants. According to Le Chatelier's principle, if the concentration of reactants is increased, the equilibrium will shift towards the side with fewer moles of reactants in order to counteract the increase. Therefore, adding water will cause the reaction to shift towards the reactants.

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7.

Because the blue ion formed when heat was added, the formation of blue ion is
- A.
  
  Endothermic
- B.
  
  Exothermic
- C.
  
  Monothermic
Correct Answer
A. Endothermic

Explanation
When heat is added and a blue ion is formed, it indicates that the reaction is absorbing energy from the surroundings. This is characteristic of an endothermic reaction, where the reactants have lower energy than the products. The energy absorbed in the form of heat causes the formation of the blue ion, making the reaction endothermic.

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8.

At the start the solution is
- A.
  
  Purple
- B.
  
  Blue
- C.
  
  Pink
Correct Answer
C. Pink

Explanation
The given solution starts with the color Purple, followed by Blue, and finally Pink. Therefore, the correct answer is Pink, as it is the last color mentioned in the solution.

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9.

Addition of HCl add Cl ions this will pushes the equilibrium toward
- A.
  
  The blue ion side
- B.
  
  The pink ion side
- C.
  
  The purple ion side
Correct Answer
A. The blue ion side

Explanation
When HCl is added, it dissociates into H+ and Cl- ions. The Cl- ions will then react with the ions present in the equilibrium system. Since the blue ions are on the same side as the Cl- ions, the addition of HCl will push the equilibrium towards the blue ion side.

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10.

What is the name of the principal that states that if a stress is placed on a reaction at equilibrium, the system will shift in a way that will relieve the stress.
- A.
  
  Avogadro's Principal
- B.
  
  Le Chatelier's Principal
- C.
  
  Mrs. Cuellar Principal
Correct Answer
B. Le Chatelier's Principal

Explanation
Le Chatelier's Principle states that if a stress is applied to a system at equilibrium, the system will adjust in a way that counteracts the stress and restores equilibrium. This principle is used to predict how changes in temperature, pressure, or concentration will affect the direction of a chemical reaction. It helps us understand how a system responds to changes and how equilibrium can be maintained or shifted.

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Current Version
Mar 20, 2023

Quiz Edited by
ProProfs Editorial Team
Feb 27, 2010

Quiz Created by
Mrscuellar

Shifts In Equilibrium Experiment

How will you notice a shift in the equilibrium during the experiment?

Which acid will be used for this experiment?

What concentration of CoCl2 will be used?

The addition of 3 ml of HCl will

Pink color means the shift in equilibrium is towards

Adding water will make the reaction shift

Because the blue ion formed when heat was added, the formation of blue ion is

At the start the solution is

Addition of HCl add Cl ions this will pushes the equilibrium toward

What is the name of the principal that states that if a stress is placed on a reaction at equilibrium, the system will shift in a way that will relieve the stress.